8821663 has 2 divisors, whose sum is σ = 8821664. Its totient is φ = 8821662.

The previous prime is 8821661. The next prime is 8821711. The reversal of 8821663 is 3661288.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8821663 - 2¹ = 8821661 is a prime.

Together with 8821661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8821661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4410831 + 4410832.

It is an arithmetic number, because the mean of its divisors is an integer number (4410832).

Almost surely, 2^8821663 is an apocalyptic number.

8821663 is a deficient number, since it is larger than the sum of its proper divisors (1).

8821663 is an equidigital number, since it uses as much as digits as its factorization.

8821663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 8821663 is about 2970.1284484008. The cubic root of 8821663 is about 206.6252955111.

The spelling of 8821663 in words is "eight million, eight hundred twenty-one thousand, six hundred sixty-three".